Protective shell



FIG. 1 is a front, right, and top perspective view of the protective shell;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a rear, right, and bottom perspective view thereof.

The broken lines are shown for the purpose of illustrating environmental structure that forms no part of the claimed design. 

CLAIM The ornamental design for a protective shell, as shown and described. 